[Sir_Substance]

>One last thing: If your interpretation is right (and it seems plausible, maybe even likely), then I really need to locally archive my emails and contacts more often haha.

I mean, yeah, you probably should if you care about it. Most office exchange servers are configured to allow some users to "unsend" emails. Outlook dutifully deletes the email from my co-workers inboxes, but my thunderbird client simply tells me that someone sent a recall request and lets me choose what to do with it.